Milling and grinding tool holder



R. ROSNER.

MILLING AND GRLNDING TQOL HOLDER.

APPLICATION FILED Nov. 1e, |918.

1,329,857. Patented Feb. 3,1920.

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RUDOLF ROQNER, GHIGAGO, ILLINOIS.

Application filed November mem l lnnoiir Rosana a residing at Cnintjy ot E@ook and State of certain n iv and use- .,lilling and Grinding which the following is a co being had to the ac 'orining a part otion axial With respect pindle oi a grinding or r embodied in this invencarriage or bearing for the 'col on the spindle.

g. 'ew et the outer clampfe View or said outer clanp o 1 2 ne ample d for extending ie struc c shown in Fig.

ol at greater distance Tffhich the spindle is ts the carriage ol in a custom- 'age mounting it foe or other inachine the tool is to be i dle for carry- V this shaft cone shoulders, 'I to be kept accurately iitted in its against lo gitudinal i.oveinent. ll, il, split bush which constitute the beari the cone-shouldered spindle, said bushings haring their opposite outer ends espectively counterl ered oonicallv to fit the vcone shoulders ot the spindle. These bushings are designed to be adjustablj,7 secured in place in the bearing bosses, 5, 5, oi the carriage by nieans of set screws, 6, 6, set through said bosses, and

Specification or Letters atent,

1913. Serial No. ZGQHSB.

inipinging against either or both of the halves ol2 said bushings respectively. The spindle has an enlargement, 3b, intermediate its ends making the diameter of thispart lly equal to the outer diameter of the b ishings, the saine being such With respect to the interior diameter of the drive pulley, 7, that the spindle with said bushings upon it can be enteredV endwise into the carriage and 'through the pulley, the latter being then secured by set screws in ythe customary Way.

The spindle is axially hollow. At one end outside the cone shoulder it is enlarged to a diameter only suiliciently less than the greatest dialneter of the cone shoulder to leave a margin tor a stop shoulder, 3d, at the outer end of the cone, and through this enlargement it is notched or split from the end approximately to the plane oiE the said stop shoulder of the cone. The length ot this enlarged and notched r split portion is designed to be snflicient to accommodate the thickness of the tool which is to be inounted upon it for rotation by it.

spindle inner and outer Washers or clainping' flanges are provided, the inner flange, l0, ha ing its central aperture` furnished With interiorly-projecting teeth or splines, adapted to engage the notch, 8C, in the end of the spindle so as to be held nonrotatahly with respect to the spindle. The outer clamping ilange li, has Wiat niay be termed a forked or split hub consisting of tivo projections, ll, 11a, which constitute pins or splines which are adapted to enter and occupy the notch or slot, C, in the end of the spindle, so that said cater flange well as the inner Hange is non-rotatable with respect to the spindle. To prevent the orlred or s slit spindle end from having its forked terminals spread by the stress of rotation of the tool Which Will be engaged and clan'iped between the ilanges when that tool is performing its Work, there is provided a sleeve, 13, Which lts closely about the enlarged end of the spindle, encoin passing its notch or slot and the leathers or splines oi the outer flange, ll, engaged therein. rlChe axial bore of the spindle is interiorly threaded beyond the notched end for a suicient distance to receive the threaded end of a bolt, 16, which is adapted to be inserted through the central aperture of the outer clamping ange, ll, and

Patented Feb. e, ieee. Y

lf or clamping the tool on this split end oic the which has a head adapted to engage against the enter side of said flange for crowding it inwardly along` the spindle to clainp the tool indicated in dotted line at 18, between the two clamping flanges.

For the purpose of extending` the spindle so as to adapt it to carry the tool at a greater distance troni the carriage, there is provided an extensor rod, 20, which is adapted to extend through the entire length oit the axial aperture of the spindle, said extensor rod having,` one end threaded to receive a nut, Q2, and the other end furnished with an enlargement, 21, having a stop shoulder, 21a, and the end notch or slot, 2lb, in all respects siinilar to the enlarged terminal of the spindle, 3, which enlargement receives the tool When the extensor io in use, and on which there may be applied the clamping` flanges and sleeve'already described `lfor holding the tool. intermediate the ent s of this extensor it is provided With a cross bar amounting` to tivo diainetrifalljvv opposite splines or feat-hers, Q3, tor engaging the notch, 3, of the spindle, so that the extensor will be rotated with and by the spindle. The nut, 22, will serve to dmv.T the extensor longitudinally with respect to the spindle to seat the cross-head or spline of the extens r in the notch, 3". or" the spindle; and a sleeve, 13, may be applied outside said split head or' the spindle for preventing,` its spreading, in case when the tool is inonnted in the spindle at that point.

I claim:-

1. ln combination with a spindle having` an axial bore interiorly threaded and split by a diametri@ notch extending in from the end; a tool-clamping flange or Washer Leases? on the spindle Yfor with a spindle and a a tool inay be clamped rotation thereby, the

spindle end being` split; sleeve iitting on the split portion to reinforce` it against snrea( z a dish or n me 'for clamping a spindle for rotation therebj,T having projections which the split ot the spindle, and means for forcing the flange in axial direction on the spindle.

3. ln the construction delined in elaiin 2, the clamping` flange having its said projections extending` parallel to the axis Within the sleeve and engaging the notch of the spindle inside the sleeve.

4f. ln combination With an axially-apertnred spindle having at one end a dian'ietrio notch, extensor for the spindle consisting or a rol which extends through and lits the axial ore of the spindle having; one end threaded to receive a nnt and having; intermediate its ends a spline or feather to enthe notch on the spindle.

ln testinoonywhereof, l have hereunto set in v l1 ,i d a. 1

y Chicago, l.. i rois, this 12th dat7 of November, 1918.

RUDOLF ROSTER. 

